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(No. Model.)

m 8. m a J 4.a ,6. t n .e .rm e mun. L0 LB I Vu Mr ..3 Lm ...m TC 8. 44, 6 3 2 m N llllll N. PErERs, PHOTO-LITMOGRAPMER, WASHINGTGN. D C.

- v UNTTTD STATES THOMAS L. MILLER, OF BURLINGTON, NEW JERSEY, ASSIGNOROF ONE- -HALF TO FRANCIS F. WESTPHAL, OF SAME PLACE.

r CULINARY BOILER.

SPECIFICATION forming part of Letters Patent No. 236,448, dated January11, 1881. Application filed November 27', 1880. (No model.)

To all whom t may concern: A represents the wall of my improved boiler,Be it known that I, THOMAS L. MILLER, a and A its bottom. B is thecover. and C a citizen ot' the United States, residing at Burverticalliuc on the outside of the wall A, the lington,in the countyofBurlingtonand State outer surface of the wall forming the inner ofNew Jersey, haveinvented a new and useful side of the iiue. The tiue is open at itslower 55 Improvement in Culinary Boilers, of which end,soastocommunicatewith the boiler-holed the following` is a specification. ofthe top plate. D, of a stove or range, but is My invention consists inthe combination, closed at its eXtreme upper end, and has an with aboiler having a vertical flue on its outopen communication with theinterior of the 1o side and communicating with the upper part boiler bymeans of the opening` b in the wall 6o thereof by an opening in the wallof the boiler A. The cover B has a liange, which at one for carrying offcondensed vapor therefrom, of side, c, extends only as far as theopening b, but a peculiarly-formed cover for opening and closat itsopposite side, c', as seen in the drawings, ing said opening, and alsoopening and closthe ange is wide enough to cover the opening air-ingressopenings, as hereinafter deing when brought into connection therewith.65 scribed. Beneath its narrow part c there are perforaln order, beforethe water becomes heated, tions d through the wall A, for the admissionto prevent a draft downward through said of a sufficient amount of coldair to condense ilue of cold air, which is admitted into the the vaporsand gases which collect in the upzo upper part of the boiler forcondensing the per part of the boiler, so that they may de- 7o vapor andgases accumulating therein, which scend into the tire-chamber throughthe line C. draft would cool the surface of the water and The operationis as follows: When the boiler retard the boiling, the cover is providedwith is placed in position, as shown in the drawa flange that lits theinterior surface of the ings, the cover B is so arranged as to bringboiler, the said flange having a widened part the wide part c ot' itsliange into connection 75 at one side in such a manner that when saidwith the opening b ofthe wall A ofthe boiler, part is brought contiguousto the above-mento cut off the communication between the intionedopening ofthe wall it will close it, and terior of the boiler and thelue O, and thus thus cut oft' the communication between the check thedraft of cold air into the boiler, 3o interior ofthe boiler and saidflue; and when which, falling on the surface of the water, 8o the coveris arranged in the reverse position, would retard the boilingoperation.When the with the narrow part ot' the iiange at the openvapors aresufficiently formed to take up the ing, the latter will be uncovered andadmit cold air which then liows through the perfothe downward passage ofthe condensed varations d the position ot' the cover B is repors andgases to the lire-chamber. The cover versed, so as to bring the narrowparte of the 85 is arranged with the wide part of the iiange liange tothe opening b of the wall, and thus in connection with said openinguntil the evapopen the flue O, whereby the condensed vaoration has aboutcommenced, and perforapors and gases, by their gravity, are caused totions in the wall for the admission of air are pass down through the dueand through the 4o likewise covered by the ange at the saine boiler-holea into the tire-chamber,where they 9o time. Then thel position ot' thecover is recommingle with the products of combustion versed to open theline and air-admission perand pass oft' therewith into the chimney orforations. smoke-Hue.

In the accompanying drawings, which make In order to facilitate thearrangement ofthe a part of this specification, Figure l is a vercover Bin either position, the handle e is in 95 tical section at the brokenline x x ot' Fig. 2. line with the middle of the parts c and c of itsFig. 2 is a horizontal section at the line y y of rim.

Fig. l. I claim as my invention- Like letters of reference in bothfigures inl. The cover B, having a ange with a nardicate the same parts.row part, c, and widened part c', 1n combmaroo tion with the Wall A ofthe boiler, having an A of a boiler having air-admission openingsopening, b, whereby to open and close the coluor perforations d,foi-openinga-i1dclosingthem, 1o munieatiou between the interior of theboiler substantially as described.

and the Hue C, substantially in the manner 5 and for the purpose setforth. THOMAS L' MILLER' 2.. The cover B, having a ang'e with a nar-Witnesses: row part, c, at one side and a Wide part, o', at STEPHENUSTICK, its opposite side, in combination with the Wall THOMAS J.BEWLEY.

